PERIASTRON
Source: 567
Per′i‐as″tron (?), n. [] (Astron.) That point, in the real or apparent orbit of one star revolving around another, at which the former is nearest to the latter.
Source: 567
Per′i‐as″tron (?), n. [] (Astron.) That point, in the real or apparent orbit of one star revolving around another, at which the former is nearest to the latter.